30分钟快速搭建CRUD的管理平台--django神奇魔法

来源:转载

加上你的准备的时间,估计30分钟完全够用了,因为最近在做爬虫管理平台,想着快速开发,没想到python web平台下有这么非常方便的框架,简洁而优雅。将自己的一些坑总结出来,方便给大家的使用。

准备环境:

系统:win7 or ubuntu

django版本:1.8.5

python版本:2.7.6

数据库:自带的SQLLITE3

IDE: sublime text 3

===========================Read ? go===================================

一,选择文件夹,用命令行创建文件夹

sudo django-admin startproject mysite

可以看到mysite文件夹,用命令行切换下mysite文件夹里面情况

.├── manage.py└── mysite├── __init__.py├── settings.py├── urls.py└── wsgi.py1 directory, 5 files

而manage.py就是我们管理mysite文件夹管理命令文件,用sublime text 3打开该文件夹。

二,在site下建立app ,输入命令:

sudo python manage.py startapp spiderinfo

这个时候文件夹的情况如下:

2015-10-18 17:09:24 ☆ BruceUbuntu in ~/Desktop/djangoprojects/mysite○ → tree.├── manage.py├── mysite│ ├── __init__.py│ ├── __init__.pyc│ ├── settings.py│ ├── settings.pyc│ ├── urls.py│ └── wsgi.py└── spiderinfo├── admin.py├── __init__.py├── migrations│ └── __init__.py├── models.py├── tests.py└── views.py

三,app情况已经创建好了,django自带了ORM,我们只需要关注代码层的情况就可以了。

这个时候打开spiderinfo文件夹下的models.py,我们来简单的设计两张表

spider爬虫表,spiderconfig爬虫配置表

代码如下:

from django.db import models# Create your models here.class SpiderConfig(models.Model):"""docstring for SpiderConfig"""cid = models.AutoField(primary_key = True)configname = models.CharField(max_length = 200)createtime = models.DateTimeField()class Spider(models.Model):Sid = models.AutoField(primary_key = True)SpiderName = models.CharField(max_length=200)Config = models.ForeignKey(SpiderConfig,to_field='cid')Enable = models.BooleanField(default = True)

每个Spider有一个SpiderConfig配置方案,这样就有一个主外键的关系,我们先将写好的关系同步到数据库:

python manage.py migrate

这个时候会自动产生脚本:

Operations to perform: Synchronize unmigrated apps: staticfiles, messages Apply all migrations: admin, contenttypes, auth, sessionsSynchronizing apps without migrations: Creating tables... Running deferred SQL... Installing custom SQL...Running migrations: Rendering model states... DONE Applying contenttypes.0001_initial... OK Applying auth.0001_initial... OK Applying admin.0001_initial... OK Applying contenttypes.0002_remove_content_type_name... OK Applying auth.0002_alter_permission_name_max_length... OK Applying auth.0003_alter_user_email_max_length... OK Applying auth.0004_alter_user_username_opts... OK Applying auth.0005_alter_user_last_login_null... OK Applying auth.0006_require_contenttypes_0002... OK Applying sessions.0001_initial... OK

同步到数据库:

python manage.py syncdb

这个时候会产生同步的过程

○ → python manage.py syncdb/usr/local/lib/python2.7/dist-packages/django/core/management/commands/syncdb.py:24: RemovedInDjango19Warning: The syncdb command will be removed in Django 1.9 warnings.warn("The syncdb command will be removed in Django 1.9", RemovedInDjango19Warning)Operations to perform: Synchronize unmigrated apps: staticfiles, messages Apply all migrations: admin, contenttypes, auth, sessionsSynchronizing apps without migrations: Creating tables... Running deferred SQL... Installing custom SQL...Running migrations: No migrations to apply.You have installed Django's auth system, and don't have any superusers defined.Would you like to create one now? (yes/no): yesUsername (leave blank to use 'bruce'): Email address: [email protected] Password: Password (again): Superuser created successfully.

这个时候会让你输入管理界面的用户名密码,正常输入就可以了。

四,运行server,打开从网页中打开。

python manage.py runserver

打开server,输入网址:

http://127.0.0.1:8000/admin/

我们就可以在后台中看到管理界面了:

五,管理的后台看不到里面的内容,这个时候我们要编辑admin.py的内容,在后台管理界面来显示

代码:

from django.contrib import adminimport spiderinfo.models as app# Register your models here.class SpiderConfigAdmin(admin.ModelAdmin):#要显示的字段列表list_display = ['Cid','Configname','Createtime']#要搜索的字段列表search_fields = ['Configname','Createtime']list_filter = ['Createtime']#max show count#list_max_show_all = 100#Config_idclass SpiderAdmin(admin.ModelAdmin):list_display =['SpiderName','Config','Enable'] #这里特别说明,比如我要根据外键的ConfigName来在Spider实体中的search_fields = ['SpiderName','Config__Configname']list_filter = ['Enable','SpiderName']admin.site.register(app.Spider ,SpiderAdmin)admin.site.register(app.SpiderConfig , SpiderConfigAdmin)

最的一步,在settings.py里面为我们的应用注册

效果如下:

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总结:说30分钟,其实只是建立一个快速搭建的界面,django写的这么优雅和简洁,30分钟怎么可能了解全部呢,一个好的东西是需要花时间好好学习的。

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